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Reptile [31]
3 years ago
10

In which type of chemical reaction do two or more substances combine to form one substance?

Chemistry
2 answers:
WINSTONCH [101]3 years ago
6 0

Explanation:

A reaction in which two or more substances combine together to form a single product is known as synthesis reaction.

For example, C + O_{2} \rightarrow CO_{2}

     or,        H_{2} + \frac{1}{2}O_{2} \rightarrow H_{2}O

During synthesis reaction, heat or light are released in the form of energy. Therefore, synthesis reactions are exothermic in nature.

pishuonlain [190]3 years ago
4 0
The answer is 
synthesis 
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The international treaty which provides operational rules on reducing greenhouse gas emissions is called:______
Ierofanga [76]

Answer:

Paris climate agreement of 2015

Explanation:

In the year 2015, global leaders seeking to join forces to combat the ever increasing emissions of green house gases which is having a bad influence on our prevailing world climate met in Paris in 2015, although the treaty became effective in the year 2016.

There are 195 signatories to the treaty. The Paris Agreement's long-term temperature goal is to keep the increase in global average temperature to well below 2 °C above pre-industrial levels; and to pursue efforts to limit the increase to 1.5 °C, recognizing that this would substantially reduce the risks and impacts of climate change.

6 0
3 years ago
over a 12.3 minuete period 5.13 E-3 moles of F2 gas effuses from a contaier. How many moles of CH4 gas could effuse from from th
Aleonysh [2.5K]

Answer : The moles of methane gas could be, 7.90\times 10^{-3}mol

Solution :

According to the Graham's law, the rate of effusion of gas is inversely proportional to the square root of the molar mass of gas.

R\propto \sqrt{\frac{1}{M}}

or,

(\frac{R_1}{R_2})=\sqrt{\frac{M_2}{M_1}}

[\frac{(\frac{n_1}{t_1})}{(\frac{n_2}{t_2})}]=\sqrt{\frac{M_2}{M_1}}

where,

R_1 = rate of effusion of fluorine gas

R_2 = rate of effusion of methane gas

n_1 = moles of fluorine gas = 5.13\times 10^{-3}mol

n_2 = moles of methane gas = ?

t_1=t_2 = time = 12.3 min  (as per question)

M_1 = molar mass of fluorine gas  = 38 g/mole

M_2 = molar mass of methane gas = 16 g/mole

Now put all the given values in the above formula 1, we get:

[\frac{(\frac{5.13\times 10^{-3}mol}{12.3min})}{(\frac{n_2}{12.3min})}]=\sqrt{\frac{16g/mole}{38g/mole}}

n_2=7.90\times 10^{-3}mol

Therefore, the moles of methane gas could be, 7.90\times 10^{-3}mol

8 0
3 years ago
__Ba3N2 + __ H2O —-> __Ba(OH)2 + __ NH3
sergeinik [125]

Answer:

is there a pic?

Explanation:

6 0
3 years ago
Which element has the lowest atomic mass?
bekas [8.4K]

Answer:

Hydrogen

Explanation:

Hydrogen has only 1 proton and has an atomic mass of 1. It does not have neutrons. Helium and above have higher mass than Hydrogen.

4 0
3 years ago
Read 2 more answers
NEED HELP FAST!!!!!!The element argon has _____ valence electrons. (Input only a whole number, such as 7.)
galben [10]

Argon has 8 valence electrons. It's atomic number is 18, therefore, in the first shell there are 2, the second has 8 and the third also has eight.

4 0
4 years ago
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